Self-closing line valve



June 17, 1924.

I A. L. MORRISON Filed July 5. 1921 Patented June 17, 1924.

(UNITED STATES ABRAHAM I MORRISON, OF DUBUQUE, IOWA.

SELF-CLOSING LINE VALVE.

Application filed July 5, 1921. Serial No. 482,417.

To all whom it may concern Be it known that I, ABRAHAM L. MORRI- soN, a citizen of the United States, and a resident of the city of Dubuque, in the county of Dubuque and State of Iowa, have invented certain new and useful Improvements in a Self-Closing Line Valve; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification. I

. This invention relates more particularly to an improved type of a self-closing line valve wherein an auxiliary valve member coacting with a main valve member is adapted to be released first by operating a lever to relieve the high pressure, after which the main valve member is raised from the main valve seat to completely open the line Valve.

It is an object of this invention to provide a self-closing line valve having a means for partially relieving the, pressure to facilitate opening of the valve.

Another object of the invention is to provide a self-closing valve wherein a plurality of valve members of different sizes are adapted to be successively lifted by manually operable means to cause opening of the valve.

It is a further object of the invention to provide a spring-controlled valve having interfitting 'valve members of difl'erent sizes the smaller of which is adapted to be opened first to relieve the high pressure on the larger valve member to permit the same ,to be more readily opened.

It is an im ortant object of this invention to provi e a self-closing line valve of simple and effective construction wherein the main valve haT an auxiliary pressure relief valve seated therein and adapted to be opened manually to partially relieve the pressure so that the main valve may be more readily lifted from its valve seat.

Other and further important objects of this invention will be apparent from the disclosures in the specification and drawings.

The invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure 1 is a longitudinal central sectionof a self-closing line valve embodying the principles of this invention showing parts in elevation.

Figure 2 is a detail section taken on line 22 of Figure l, with parts illustrated in elevation.

As shown in the drawings:

Numeral 1 indicates a valve housing or casing having the ends thereof internally threaded at 2 to permit line pipes tobe en-' the plug shank 9 is an inwardly projecting guide sleeve 11 in which the upper end of a valve stem 12 is slidably engaged.

The valve stem 12 has integrally formed thereon a flange 13 below which an auxiliary valve disc 14 is engaged. The valve stem 12 is threaded below the flange 13 to permit a sleeve or collar 15 to be threaded thereon to hold the valve disc 14 in place against the lower surface of the flange 13. A flange 16 is integrally formed on the lowerend of the sleeve 15. Slidably en aged on the sleeve 15 is an externally threa ed collar 17 having a flange 18 integrally formed on the upper end thereof. A conical valve seat 19 is provided in the flange 18 against which the auxiliary valve disc 14 is adapted to seat. A coiled spring 20 is engaged around the plug sleeve 11 and around the upper portion of the valve stem 12. The s rin 20 has the upper and contacting the plhg s ank 9, while the lower end rests on the stem flange 18 to hold the auxiliary valve disc 14 seated on the valve seat 19. A main valve disc 21 is held against the under surface of the flange 18 by means of a nut 22 threaded onto the collar 17. The lower end of the valve stem 12 is provided with a notch for receiving the free end of a finger or lever 23 pivotall mounted within the outlet chamber of t e valve housing.

1 auxiliary valve member, a spring for hold- The lever 23 is connected with an externahandle 24 to permit Operation of saidlever to'cause opening'of the valve. I

The operation is as follows:

The valve is of the'self-closing t pe havthe spring .20 which acts to old the small valve member 14: and the large valve member 21 seated against the res tive valve seats 19 and 6, thereby closing t e. valve and I shutting of! communication between the valve chambers 4 and 5.

To open the valve a ainst the high pressure in the chamber l, he pressure is first slightly relieved by-opcrating. the handle 24 whereby the lever 23 is swun upwardly to slide the valve stem 12 upwar action ofthe spring and the pressure 1n the chamber 4. Upward movement of the valve stem 12 causes the auxiliary valve member or disc 14 to move upwardly from the valve seat- 19, thereby partially opening.

the valve to relieve the great pressure upon the main valve member 21. As the auxiliary valve member is forced into open position the flange 16, which moves upwardly with the valve stem 12, is brought into' contact with the lower end of the collar 17 and thus .acts to raise the main valvemember 21 off of the valve seat '6 to open communications between the valve chambers 4 and 5.

Upon release of the handle 24- the control spring 20 acts automatically to first-move the auxiliary valve 14 against the valve seat 19 thereby causing the main valve 21 to seat upon the valve seat 6 to close the valve.

I am aware that numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I thereforedo not purpose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention: Y

1. A. valve comprising housing,"a partition therein, a main W; e seat in said'par- 1y against the valve seat in said main valve member, an

ingthe auxiliary valve member seated'in sa1d auxiliary valve seat and causing the main valve member to seat in said main valve seat, a valve stem connected'with said auxiliary valve member, a flanged sleeve on said stem projecting through said main valve member, means en aging said stem adapted to be operated to rst cause 0 ening of said auxiliary valve member an then openin of the main valve member by the flange sleeve and a removable plug in said casing concentric with the main valve seat and provided with a hollow stem adapted to enter and support one end of the spring and to receiveone end of said valve stem.

2. A valve comprising a housin having inlet and outlet chambers at its ends, a par tition comprising longitudinal and transverse portions, a main valve seat in the longitudinal ortion of the partition, a main valve mem er, an auxiliary valve seat in'said main valve member, an auxiliary valve member, a spring for holding the auxiliary valve member seated in said auxiliary valve seat and causing the main valve to seat in said main valve seat, a valve stem connected with said auxiliary valve member, a flanged sleeve on said-stem projecting through said main valve member, a removable plug in said casing concentric with said valve seat, a hollow stem on said plug adapted to enter the spring and to receive the said valve stem, and means engagin said valve stem adapted to be operated to rst cause 0 ening of said auxiliary valve member and, t en opening ofthe main valve member by the flanged sleeve.

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses.

ABRAHAM L. MORRISON Witn:

' J. C. WALKER, 

